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lll. Receiving Instructions
Upon receipt, inspect the batteries for physical damage to the containers and terminals. If found, a claim
must be filed with the carrier within 10 days. Also check the packing slip to make sure all material has
arrived. The batteries are shipped fully charged. Their Open Circuit Voltage (OCV) should not be below
12.48 volts per 12 volt unit.
lV. Storage Instructions
Store batteries in a clean, dry, cool area away from radiant heat sources. Recharge batteries in storage
every 6 months or before their OCV declines to 12.48 VDC. Follow instructions as outlined in section VI
Freshening Charge.
V. Installation Instructions-Required Installation Tools & Room
Equipment
At a minimum, the following tools and equipment are required to install VRLA batteries. A digital
voltmeter, insulated 7/16” socket wrench, inch pound torque wrench (110 in. lb.), rubber gloves, safety
glasses for normal maintenance, full face shield for load testing, optional plastic apron, potable eyewash,
spill kit and fire extinguisher (Class C).
Optional test equipment, depending on the type of checkout to be performed includes; micro-ohm meter,
ohmic test set, 100 amp momentary load test set or system load bank.
Typically for Telecom applications, four individual batteries are connected in series to form a higher
voltage string of batteries (e.g. 4 each 12 volt batteries connected in series form a 48VDC battery
system). Refer to Figure 1 for a 48 VDC series connected battery string using 12 volt front access
batteries.
Two or more strings may be connected in parallel to increase the total capacity of the
system (e.g. two strings of 48 volt 75 ampere-hour batteries connected in parallel make a 48 volts
150 Amp hour battery. Refer to Figure 2 for parallel connected front access batteries.
Warranty Date Code
C&D’s front access batteries date code is located on the front panel of the battery as a four digit
number, MMYY (e.g., 1107 means November 2007).
Series -48VDC connection of individual front access batteries
Front access batteries are heavy, typically over 100 pounds each. Make sure the proper lifting and
moving arrangements to safely handle this weight have been considered before traveling to the site.
Note: Disconnect the battery string(s) (A or B) being installed from the DC source by turning
the circuit breaker off, if so equipped as noted in Figure 1.
Step 1. Beginning with the lowest shelf, string A, place each the individual front access batteries on
the shelf (4 per shelf) with approximately 1/2 inch spacing between the individual units. All the
batteries should be placed with terminals to the front of the rack / shelf. Remove and save terminal
protectors (see Figures 2 & 3).
Step 2. C&D recommends, prior to connection of inter-unit bus bars and/or cables, the battery
terminals and all contact surfaces should be cleaned, lightly brushed with a brass bristle brush or
scotch brite type pad and lightly coated with protective No-Ox-Id terminal grease.
Step 3a. Starting at the battery on the right, which is to be the positive (+) output, label it as number 1
and then label the adjacent batteries (right to left) in ascending numerical order 2, 3 & 4 (see Figures 1 ,
2 & 3).
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